Three-dimensional printer

ABSTRACT

A three-dimensional printer includes: a machine mainframe, formed with a carrying plane; a three-dimensional printing module, installed on the machine mainframe, and used for forming a three-dimensional object on the carrying plane according to a three-dimensional model data; and a color spraying nozzle module, installed on the machine mainframe and used for coloring a surface of the three-dimensional object according to the three-dimensional model data, wherein the color spraying nozzle module includes at least one color spraying nozzle and at least one screen member, the color spraying nozzle is formed with at least one nozzle hole, the screen member is formed with at least one screen hole, the screen hole is arranged corresponding to the nozzle hole, and the area of the screen hole is smaller than the area of the nozzle hole thereby enabling the color spraying nozzle module to more efficiently color the three-dimensional object.

BACKGROUND OF THE INVENTION

Field of the Invention

The present invention relates to a printer, especially to athree-dimensional printer.

Description of Related Art

The three-dimensional printing is one of the technologies for fastformation and can be applied on laminating materials such as metalpowders or plastic; with a means of gradually depositing multiple layersfor forming an object, a depositing fabrication is provided. As present,toy components, mechanical components or human bone pieces can all befabricated by utilizing the three-dimensional printing, so that thethree-dimensional printing has become one of the commonly-knowntechnologies.

In addition, the color of a three-dimensional printing finished productis mostly the color of the laminating material itself such as metalpowders or plastic, if the three-dimensional printing finished productis required to be provided with multiple colors, a color printing nozzleis needed for coloring the three-dimensional printing finished product,so that the three-dimensional printing finished product can be providedwith a colorful appearance.

However, a conventional color printing nozzle has followingdisadvantages: because the three-dimensional printing finished productis fabricated through a means of depositing multiple layers, the colorprinting nozzle only has to be used for coloring the outer periphery ofthe three-dimensional printing finished product, but the dimension ofthe ejecting port of the conventional color printing nozzle is overlylarge and the ejecting angle is overly wide, the paint may bedistributed to other areas of the three-dimensional printing finishedproduct, thus the three-dimensional printing finished product would haveshortages of not being precisely colored or the color not being evenlydistributed.

Accordingly, the applicant of the present invention has devoted himselffor improving the mentioned disadvantages.

SUMMARY OF THE INVENTION

The present invention is to provide a three-dimensional printer, whichhas advantages of depositing and forming a three-dimensional object andcoloring the three-dimensional object at the same time, and the area ofa screen hole is smaller than the area of a nozzle hole of a colorspraying nozzle, so that a color spraying nozzle module is able to moreefficiently and conveniently color the three-dimensional object.

Accordingly, the present invention provides a three-dimensional printerused for forming a three-dimensional object; the three-dimensionalprinter comprises: a machine mainframe, formed with a carrying plane; athree-dimensional printing module, installed on the machine mainframe,and used for forming the three-dimensional object on the carrying planeaccording to a three-dimensional model data; and a color spraying nozzlemodule, installed on the machine mainframe and used for coloring asurface of the three-dimensional object according to thethree-dimensional model data, wherein the color spraying nozzle moduleincludes at least one color spraying nozzle and at least one screenmember, the color spraying nozzle is formed with at least one nozzlehole, the screen member is formed with at least one screen hole, thescreen hole is arranged corresponding to the nozzle hole, and the areaof the screen hole is smaller than the area of the nozzle hole.

Based on what has been disclosed above, because the screen hole isarranged corresponding to the nozzle hole and the area of the screenhole is smaller than the area of the nozzle hole, the screen hole isable to reduce the coloring area and angle of the nozzle hole, so thatthe color spraying nozzle is enabled to more efficiently andconveniently color the outer surface of each layer of thethree-dimensional object.

Based on what has been disclosed above, the three-dimensional printingmodule includes a moving unit and a three-dimensional printing nozzle,the three-dimensional printing nozzle is fastened on the moving unit, sothe three-dimensional printing nozzle and the color spraying nozzle aretogether fastened on the moving unit and moved with the moving unit,thereby enabling the three-dimensional printer provided by the presentinvention to more rapidly deposit and color the three-dimensionalobject.

Based on what has been disclosed above, the screen member includes anadjusting structure, and the screen member can utilize the adjustingstructure to adjust the dimension of the screen hole arrangedcorresponding to the nozzle hole so as to adjust the coloring area andangle of the nozzle hole, thereby allowing the three-dimensional printerto be provided with an advantage of precisely spraying and coating.

Based on what has been disclosed above, the three-dimensional printerfurther includes a cover structure, and the cover structure is able topartially cover, fully cover or fully expose the plural screen holes,thereby limiting the colors and quantity of the nozzle holes forsatisfying a desired coloring plan.

BRIEF DESCRIPTION OF DRAWING

FIG. 1 is a schematic view showing the assembly of a three-dimensionalprinter according to a first embodiment of the present invention;

FIG. 2 is a perspective view showing the three-dimensional printeraccording to the first embodiment of the present invention;

FIG. 3 is a cross sectional view showing a color spraying nozzle moduleaccording to the first embodiment of the present invention;

FIG. 4 is a schematic view showing an operating status of the colorspraying nozzle module according to the first embodiment of the presentinvention;

FIG. 5 is a cross sectional view showing the color spraying nozzlemodule according to a second embodiment of the present invention;

FIG. 6 is a schematic view showing the assembly of the three-dimensionalprinter according to a third embodiment of the present invention;

FIG. 7 is a perspective view showing a three-dimensional printing moduleaccording to a fourth embodiment of the present invention;

FIG. 8 is a schematic view showing an operating status of the colorspraying nozzle module according to the fourth embodiment of the presentinvention;

FIG. 9 is a perspective view showing the color spraying nozzle moduleaccording to a fifth embodiment of the present invention;

FIG. 10 is a schematic view showing an operating status of the colorspraying nozzle module according to a sixth embodiment of the presentinvention;

FIG. 11 is a schematic view showing an operating status of the colorspraying nozzle module according to a seventh embodiment of the presentinvention;

FIG. 12 is a schematic view showing an operating status of the colorspraying nozzle module according to an eighth embodiment of the presentinvention;

FIG. 13 is a schematic view showing an operating status of the colorspraying nozzle module according to a ninth embodiment of the presentinvention;

FIG. 14 is a schematic view showing another operating status of thecolor spraying nozzle module according to the ninth embodiment of thepresent invention;

FIG. 15 is a schematic view showing an operating status of the colorspraying nozzle module according to a tenth embodiment of the presentinvention; and

FIG. 16 is a schematic view showing another operating status of thecolor spraying nozzle module according to the tenth embodiment of thepresent invention.

DETAILED DESCRIPTION OF THE INVENTION

Preferred embodiments of the present invention will be described withreference to the drawings.

Please refer to FIG. 1, which discloses a first embodiment of athree-dimensional printer provided by the present invention. Thethree-dimensional printer 10 mainly comprises a machine mainframe 1, athree-dimensional printing module 2 and a color spraying nozzle module3.

As shown in FIG. 1, the machine mainframe 1 is formed with a carryingplane 11, according to this embodiment, the three-dimensional printer 10is a fused filament fabrication (FFF) three-dimensional printer, butwhat shall be addressed is that the scope of the present invention isnot limited to the above-mentioned disclosure, the three-dimensionalprinter 10 can also be other three-dimensional printers such asstereolithography apparatus (SLA), selective laser sintering (SLS),laminated object manufacturing (LOM) and three dimensional printing(3DP).

Please refer from FIG. 1 to FIG. 4, the three-dimensional printingmodule 2 is installed on the machine mainframe 1, and used for forming athree-dimensional object 100 on the carrying plane 11 according to athree-dimensional model data. The three-dimensional printing module 2includes a moving unit 21 and a three-dimensional printing nozzle 22,the moving unit 21 is installed on the machine mainframe 1, and thethree-dimensional printing nozzle 22 is fastened on the moving unit 21and moved with the moving unit 21.

Details are provided as follows. The moving unit 21 includes a first rodmember 211, a second rod member 212 and a nozzle carrier 213. The nozzlecarrier 213 is formed with a first hole 214 and a second hole 215 whichare perpendicular to each other, the first rod member 211 is sleeved inthe first hole 214 and capable of sliding therein, the second rod member212 is sleeved in the second hole 215 and capable of sliding therein,and the three-dimensional printing nozzle 22 is fastened on the nozzlecarrier 213 and moved with the nozzle carrier 213.

Wherein, the first rod member 211 is defined as one of an X axis rod ora Y axis rod, the second rod member 212 is defined as one of the X axisrod or the Y axis rod, the first hole 214 and the second hole 215 arerespectively defined as corresponding axial holes, and the nozzlecarrier 213 is able to be driven through a belt to slide relative to thefirst rod member 211 and the second rod member 212. In addition, thefirst rod member 211 is defined as one of a X screw rod or a Y screwrod, the second rod member 212 is defined as one of the X screw rod orthe Y screw rod, the first hole 214 and the second hole 215 arerespectively defined as corresponding screw holes, and the nozzlecarrier 213 is able to be driven through a screw transmission formed bya screw rod and a screw hole to slide relative to the first rod member211 and the second rod member 212.

As shown from FIG. 1 to FIG. 4, the color spraying nozzle module 3 isinstalled on the machine mainframe 1, and used for coloring a surface ofthe three-dimensional object 100 according to the above-mentionedthree-dimensional model data, and the color spraying nozzle module 3includes one or a plurality of color spraying nozzles 31 and one or aplurality of screen members 32. Wherein, according to this embodiment,the quantity of the color spraying nozzle 31 and the quantity of thescreen member 32 are both one, but what shall be addressed is that thescope of the present invention is not limited to the above-mentionedarrangement.

The color spraying nozzle 31 is formed with one or a plurality of nozzleholes 311, and the screen member 32 is formed with one or a plurality ofscreen holes 321. Wherein, according to this embodiment, the quantity ofthe nozzle hole 311 on the same color spraying nozzle 31 is one, thequantity of the screen hole 321 on the same screen member 32 is one, butwhat shall be addressed is that the scope of the present invention isnot limited to the above-mentioned arrangement, the nozzle hole 311 canbe a nozzle hole spraying single color or multiple colors.

In addition, the screen hole 321 is arranged corresponding to the nozzlehole 311, and the area of the screen hole 321 is smaller than the areaof the nozzle hole 311. Wherein, the length of the screen hole 321 issmaller than the length of the nozzle hole 211, the width of the screenhole 321 is smaller than the width of the nozzle hole 311, the lengthand the width of the screen hole 321 can be manually or electricallyadjusted for allowing the screen hole to be adjusted to a smaller area,so that the coloring location of a printing object can be more preciselycolored. Further illustrations are provided as follows. The colorspraying nozzle 31 is fastened on and carried by the moving unit 21 soas to be moved with the moving unit 21, in other words the colorspraying nozzle 31 is fastened on the nozzle carrier 213 and moved withthe nozzle carrier 213, and the screen member 32 is fastened on thecolor spraying nozzle 31 and served to cover the color spraying nozzle31.

As shown in FIG. 1, the three-dimensional printer 10 provided by thepresent invention further comprises a processor 4 which is respectivelyand electrically connected to the three-dimensional printing module 2and the color spraying nozzle module 3, and the processor 4 is used forreceiving the above-mentioned three-dimensional model data forcalculating the color printing route of the color spraying nozzle 31.

As shown from FIG. 1 to FIG. 4, the assembly of the three-dimensionalprinter 10 provided by the present invention is that: the machinemainframe 1 is formed with the carrying plane 11; the three-dimensionalprinting module 2 is installed on the machine mainframe 1 and used forforming the three-dimensional object 100 on the carrying plane 11according to the three-dimensional model data; the color spraying nozzlemodule 3 is installed on the machine mainframe 1 and used for coloringthe surface of the three-dimensional object 100 according to theabove-mentioned three-dimensional model data, the color spraying nozzlemodule 3 includes the color spraying nozzle 31 and the screen member 32,the color spraying nozzle 31 is formed with the nozzle hole 311, thescreen member 32 is formed with the screen hole 321, the screen hole 321is arranged corresponding to the nozzle hole 311, and the area of thescreen hole 321 is smaller than the area of the nozzle hole 311.Accordingly, the three-dimensional printer 10 is provided with bothfunctions of depositing and forming the three-dimensional object 100 andcoloring the three-dimensional object 100, and the area of the screenhole 321 is smaller than the area of the nozzle hole 311 of the colorspraying nozzle 31, so that the color spraying nozzle 31 is able to moreefficiently and precisely color the three-dimensional object 100.

As shown in FIG. 4, the operating status of the three-dimensionalprinter 10 provided by the present invention is that: thethree-dimensional printing module 2 is firstly used for forming thethree-dimensional object 100 by a means of depositing multiple layers,then the color spraying nozzle 31 is used for coloring the outer surfaceof each of the layers of the three-dimensional object 100.

However, the coloring area and angle are rather large due to thedimension of the above-mentioned nozzle hole 311, because the thicknessof each of the layers of the three-dimensional object 100 is between 0.1mm to 0.4 mm, the coloring area and angle of each of the layers of thethree-dimensional object 100 are relatively smaller, thus the screenhole 321 is arranged corresponding to the nozzle hole 311, and thelength and the width (the area) of the screen hole 321 is smaller thanthe length and the width (the area) of the nozzle hole 311, so that thescreen hole 321 is able to reduce the coloring area of the nozzle hole311, and the color spraying nozzle 31 is able to more efficiently andprecisely color the outer surface of each of the layers of thethree-dimensional object 100.

In addition, the processer 4 (please refer to FIG. 1) is able to receivethe above-mentioned three-dimensional model data for calculating thecolor printing route of the color spraying nozzle 31, so thethree-dimensional printing module 2 can be firstly used for depositingeach of the layers of the three-dimensional object 100, then the movingunit 21 is used for driving the color spraying nozzle 31 to color eachof the layers of the three-dimensional object 100.

Moreover, the three-dimensional printing nozzle 22 and the colorspraying nozzle 31 are together fastened on the moving unit 21 and movedwith the moving unit 21, so that the three-dimensional printer 10provided by the present invention is enabled to effectively deposit andcolor the three-dimensional object 100.

Please refer to FIG. 5, which discloses the color spraying nozzle module3 according to a second embodiment of the present invention. The secondembodiment is substantially the same as the first embodiment, and thedifference between the second embodiment and the first embodiment isthat the screen member 32 is fastened on the nozzle carrier 213 andserved to cover the color spraying nozzle 31. Accordingly, the samefunctions and effects provided by the first embodiment can also beachieved.

Please refer to FIG. 6, which discloses a third embodiment of thethree-dimensional printer 10 provided by the present invention. Thethird embodiment is substantially the same as the first embodiment, andthe difference between the third embodiment and the first embodiment isthat the three-dimensional printer 10 is a stereolithography apparatus(SLA) three-dimensional printer.

Details are provided as follows. The stereolithography apparatus (SLA)three-dimensional printer is adopted as the three-dimensional printer10, so the machine mainframe 1 includes a tank 5 and a light source unit6, and the color spraying nozzle module 3 further includes an actuationmechanism 33 installed on the machine mainframe 1, the color sprayingnozzle 31 is fastened on the actuation mechanism 33 and moved with theactuation mechanism 33. Accordingly, the stereolithography apparatus(SLA) three-dimensional printer can be used for firstly forming thethree-dimensional object 100 by a means of depositing multiple layers,and the color spraying nozzle 31 and the screen member 32 are used forcoloring the outer surface of each of the layers of thethree-dimensional object 100 through the actuation mechanism 33, so thatthe same functions and effects provided by the first embodiment can alsobe achieved

In addition, according to this embodiment, the actuation mechanism 33 isa mechanical arm, but what shall be addressed is that the scope of thepresent invention is not limited to the above-mentioned mechanical arm;the actuation mechanism 33 can be altered according to actual needs.

Moreover, according to this embodiment, the stereolithography apparatus(SLA) three-dimensional printer is adopted as the three-dimensionalprinter 10, but all be addressed is that the scope of the presentinvention is not limited to the above-mentioned, the three-dimensionalprinter can also be other three-dimensional printers such as fusedfilament fabrication (FFF), selective laser sintering (SLS), laminatedobject manufacturing (LOM) and three dimensional printing (3DP).

Please refer to FIG. 7 and FIG. 8, which discloses a fourth embodimentof the three-dimensional printer 10 provided by the present invention.The fourth embodiment is substantially the same as the first embodiment,and the difference between the fourth embodiment and the firstembodiment is that the quantity of the nozzle holes 311 on the samecolor spraying nozzle 31 is plural, and the quantity of the screen holes321 on the same screen member 32 is plural.

Details are provided as follows. According to this embodiment, theplural nozzle holes 311 of the color spraying nozzle 31 are a pluralityof nozzle holes capable of ejecting single color, each of the screenholes 321 is respectively arranged corresponding to each of the nozzleholes 311, so that the same functions and effects provided by the firstembodiment can also be achieved.

Please refer to FIG. 9, which discloses a fifth embodiment of thethree-dimensional printer 10 provided by the present invention. Thefifth embodiment is substantially the same as the first embodiment, andthe difference between the fifth embodiment and the first embodiment isthat the screen member 32 includes an adjusting structure 322 used foradjusting the dimension of the screen hole 321 arranged corresponding tothe nozzle hole 311.

Details are provided as follows. The quantity of the screen holes 321 onthe same screen member 32 is plural, the dimensions of the plural screenholes 321 are different from each other, the adjusting structure 322 isa mobile member 323 connected between the color spraying nozzle 31 andthe screen member 32, the mobile member 323 is able to drive the screenmember 32 to slide relative to the color spraying nozzle 31, so that oneof the plural screen holes 321 is able to be selected for being arrangedcorresponding to the nozzle hole 311.

In addition, the mobile member 323 includes a supporter 3231 and a sliderail 3232, the supporter 3231 is formed through being extended from thecolor spraying nozzle 31, the slide rail 3232 is formed on the screenmember 32, the supporter 3231 is able to slide on the slide rail 3232for driving the screen member 32 to move relative to the nozzle hole311, so that one of the plural screen holes 321 having differentdimensions can be selected for being arranged corresponding to thenozzle hole 311.

Accordingly, because the coloring area and angle of the nozzle hole 311are relatively larger and the dimension thereof is fixed, the coloringarea and angle required at a corner or an edge defined at the coloringlocation of the three-dimensional object to be colored are relativelysmaller, and the coloring area and angle required on a surface definedat the coloring location of the three-dimensional object to be coloredare relatively larger, different coloring areas and angles are requiredwith respect to the different coloring locations of thethree-dimensional object, the screen member 32 is able to utilize theadjusting structure 322 to select the screen hole 321 with the requireddimension from the plural screen holes 321 having different dimensionsfor being arranged corresponding to the nozzle hole 311, so that thescreen member 32 is able to adjust the dimension of the screen hole 321so as to adjust the coloring area and angle of the nozzle hole 311,thereby allowing the three-dimensional printer 10 to be provided with anadvantage of precisely spraying and coating.

Please refer to FIG. 10, which discloses a sixth embodiment of thethree-dimensional printer 10 provided by the present invention. Thesixth embodiment is substantially the same as the fifth embodiment, andthe difference between the sixth embodiment and the fifth embodiment isthat the adjusting structure 322 includes a mobile member 323′ and amoving plate 3235.

Details are provided as follows. The moving plate 3235 is arrangedcorresponding to the screen hole 321 and formed with a plurality ofhollow holes 3236 having different dimensions, the mobile member 323′ isconnected between the moving plate 3235 and the screen member 32, themobile member 323′ is electrically connected to the processor 4 (pleaserefer to FIG. 1) and capable of driving the moving plate 3235 to sliderelative to the screen hole 321, so that one of the plural hollow holes3236 is able to be selected for being arranged corresponding to thescreen hole 321.

In addition, the mobile member 323′ includes a supporter 3231′, a sliderail 3232′, a rack 3233 and a driving gear 3234, the supporter 3231′ isformed through being extended from the screen member 32, the slide rail3232′ and the rack 3233 are respectively formed on the moving plate3235, the supporter 3231′ is able to slide on the slide rail 3232′, thedriving gear 3234 is electrically connected to the processor 4 (pleaserefer to FIG. 1) and engaged with the rack 3233 for the purpose oftransmission, the processor 4 (please refer to FIG. 1) is able toreceive the above-mentioned three-dimensional model data and calculatethe data for controlling the driving gear 3234 to rotate, so that themoving plate 3235 is driven to move relative to the screen hole 321,thereby enabling the hollow hole 3236 with the required dimension to beselected from the plural hollow holes 3236 having different dimensionsfor being arranged corresponding to the screen hole 321.

Accordingly, the screen member 32 can utilize the adjusting structure322 to select the hollow hole 3236 with the required dimension from theplural hollow holes 3236 having different dimensions for being arrangedcorresponding to the screen hole 321, so that the screen member 32 isable to adjust the dimension of the screen hole 321 so as to adjust thecoloring area and angle of the nozzle hole 311 (please refer to FIG. 9),thereby allowing the three-dimensional printer 10 to be provided with anadvantage of precisely spraying and coating.

Please refer to FIG. 11, which discloses a seventh embodiment of thethree-dimensional printer 10 provided by the present invention. Theseventh embodiment is substantially the same as the sixth embodiment,and the difference between the seventh embodiment and the sixthembodiment is that a moving plate 3235′ is arranged corresponding to thescreen hole 321 and formed with a trapezoid elongated hole 3237.

Details are provided as follows. The mobile member 323′ is connectedbetween the moving plate 3235′ and the screen member 32, the mobilemember 323′ is electrically connected to the processor 4 (please referto FIG. 1) and capable of driving the moving plate 3235′ to sliderelative to the screen hole 321, so that the trapezoid elongated hole3237 is able to be driven to slide relative to the screen hole 321.

Accordingly, during the sliding process of the trapezoid elongated hole3237 relative to the screen hole 321, because the width of the trapezoidelongated hole 3237 itself is gradually reduced, the smaller width ofthe trapezoid elongated hole 3237 being arranged corresponding to thescreen hole 321 is able to limit the coloring area and angle of thenozzle hole 311 (please refer to FIG. 9), the larger width of thetrapezoid elongated hole 3237 being arranged corresponding to the screenhole 321 is able to maintain the coloring area and angle of the nozzlehole 311 (please refer to FIG. 9), so that the coloring area and angleof the nozzle hole 311 (please refer to FIG. 9) can be adjusted, therebyallowing the three-dimensional printer 10 to be provided with anadvantage of precisely spraying and coating. Please refer to FIG. 12,which discloses an eighth embodiment of the three-dimensional printer 10provided by the present invention. The eighth embodiment issubstantially the same as the fifth embodiment, and the differencebetween the eighth embodiment and the fifth embodiment is that theadjusting structure 322 is a hole shielding member 324 arrangedcorresponding to the screen hole 321, the hole shielding member 324 isable to partially shield, fully shield or fully exposed the screen hole321.

Details are provided as follows. The hole shielding member 324 includesa rotary shutter 3241, a rack 3242 and a driving gear 3243, the rotaryshutter 3241 is arranged corresponding to the screen hole 321, the rack3242 is formed on the rotary shutter 3241, the driving gear 3243 iselectrically connected to the processor 4 (please refer to FIG. 1) andengaged with the rack 3242 for the purpose of transmission, theprocessor 4 (please refer to FIG. 1) is able to receive theabove-mentioned three-dimensional model data and calculate the data forcontrolling the driving gear 3243 to rotate, so that an aperture of therotary shutter 3241 can be controlled for being opened or closed,thereby enabling the aperture of the rotary shutter 3241 to partiallyshield, fully shield or fully expose the screen hole 321.

Accordingly, the smaller aperture of the rotary shutter 3241 is able tolimit the coloring area and angle of the nozzle hole 311 (please referto FIG. 9) and the screen hole 321, the larger aperture of the rotaryshutter 3241 is able to maintain the coloring area and angle of thenozzle hole 311 (please refer to FIG. 9) and the screen hole 321, sothat the coloring area and angle of the nozzle hole 311 (please refer toFIG. 9) can be adjusted, thereby allowing the three-dimensional printer10 to be provided with an advantage of precisely spraying and coating.

Please refer to FIG. 13 and FIG. 14, which discloses a ninth embodimentof the three-dimensional printer 10 provided by the present invention.The ninth embodiment is substantially the same as the sixth embodiment,and the difference between the ninth embodiment and the sixth embodimentis that the quantity of the nozzle holes 311 on the same color sprayingnozzle 31 is plural, the quantity of the screen members 32 is plural,and each of the screen members 32 is respectively arranged correspondingto each of the nozzle holes 311.

Details are provided as follows. Each of the screen members 32 canutilize the adjusting structure 322 to adjust the coloring area andangle of each of the nozzle holes 311. When the coloring location of thethree-dimensional object to be colored is defined at an corner or anedge, the dimension of the screen hole 321 arranged corresponding to thenozzle hole 311 is reduced for limiting the coloring area and angle ofthe nozzle hole 311; when the coloring location of the three-dimensionalobject to be colored is defined on a surface, the dimension of thescreen hole 321 arranged corresponding to the nozzle hole 311 isenlarged for maintaining the coloring area and angle of the nozzle hole311.

So based on the same principle, the quantity of nozzle holes 311 on thesame color spraying nozzle 31 disclosed in the fifth, the seventh andthe eighth embodiment can be plural, the quantity of the screen members32 can be plural, and each of the screen members 32 is respectivelyarranged corresponding to each of the nozzle holes 311.

Please refer to FIG. 15 and FIG. 16, which discloses a tenth embodimentof the three-dimensional printer 10 provided by the present invention.The tenth embodiment is substantially the same as the fourth embodiment,and the difference between the tenth embodiment and the fourthembodiment is that the three-dimensional printer 10 provided by thepresent invention further includes a cover structure 7.

Details are provided as follows. The quantity of nozzle holes 311 on thesame color spraying nozzle 31 is plural (please refer to FIG. 7 and FIG.8), the quantity of the screen holes 321 is plural, and each of thescreen holes 321 is respectively arranged corresponding to each of thenozzle holes 311 (please refer to FIG. 7 and FIG. 8), the coverstructure 7 is arranged corresponding to the plural screen holes 321,and the cover structure 7 is able to partially cover, fully cover orfully expose the plural screen holes 321.

In addition, the cover structure 7 includes one or a plurality of mobilecover gates 71 and one or a plurality of driving gears 72, the screenmember 32 includes a supporter 325, the mobile cover gate 71 includes aslide rail 711 and a rack 712, the supporter 325 is able to slide on theslide rail 711, the driving gear 72 is electrically connected to theprocessor 4 (as shown in FIG. 1) and engaged with the rack 712 for thepurpose of transmission, the processor 4 (please refer to FIG. 1) isable to receive the above-mentioned three-dimensional model data andcalculate the data for controlling the driving gear 72 to rotate, sothat the mobile cover gate 71 is driven to slide relative to the pluralscreen holes 321 for enabling the mobile cover gate 71 to partiallycover, fully cover or fully expose the plural screen hole 321.

Accordingly, the mobile cover gate 71 is able to partially cover, fullycover or fully expose the plural screen hole 321 so as to partiallycover, fully cover or fully expose the plural nozzle holes 311 (pleaserefer to FIG. 7 and FIG. 8), thereby limiting the colors and quantity ofthe nozzle holes 311 for satisfying a desired coloring plan.

Based on what has been disclosed above, the three-dimensional printerprovided by the present invention is novel and more practical in usecomparing to prior art.

Although the present invention has been described with reference to theforegoing preferred embodiment, it will be understood that the inventionis not limited to the details thereof. Various equivalent variations andmodifications can still occur to those skilled in this art in view ofthe teachings of the present invention. Thus, all such variations andequivalent modifications are also embraced within the scope of theinvention as defined in the appended claims.

What is claimed is:
 1. A three-dimensional printer, used for forming athree-dimensional object and comprising: a machine mainframe, formedwith a carrying plane; a three-dimensional printing module, installed onthe machine mainframe, and used for forming the three-dimensional objecton the carrying plane according to a three-dimensional model data; and acolor spraying nozzle module, installed on the machine mainframe andused for coloring a surface of the three-dimensional object according tothe three-dimensional model data, wherein the color spraying nozzlemodule includes at least one color spraying nozzle and at least onescreen member, the color spraying nozzle is formed with at least onenozzle hole, the screen member is formed with at least one screen hole,the screen hole is arranged corresponding to the nozzle hole, and anarea of the screen hole is smaller than that of the nozzle hole.
 2. Thethree-dimensional printer according to claim 1, wherein the screenmember includes an adjusting structure which is used for adjusting adimension of the screen hole arranged corresponding to the nozzle hole.3. The three-dimensional printer according to claim 2, wherein there area plurality of the screen holes formed on the same screen member, thedimensions of the plural screen holes are different from each other, theadjusting structure is a mobile member connected between the colorspraying nozzle and the screen member, the mobile member is able todrive the screen member to slide relative to the color spraying nozzle,so that one of the plural screen hole is able to be selected for beingarranged corresponding to the nozzle hole.
 4. The three-dimensionalprinter according to claim 3, wherein the mobile member includes asupporter and a slide rail, the supporter is formed through beingextended from the color spraying nozzle, the slide rail is formed on thescreen member, and the supporter is able to slide on the slide rail. 5.The three-dimensional printer according to claim 2, wherein theadjusting structure includes a mobile member and a moving plate, themoving plate is arranged corresponding to the screen hole and formedwith a plurality of hollow holes having different dimensions, the mobilemember is connected between the moving plate and the screen member, themobile member is able to drive the moving plate to slide relative to thescreen hole, so that one of the plural hollow holes is able to beselected for being arranged corresponding to the screen hole.
 6. Thethree-dimensional printer according to claim 5, wherein the mobilemember includes a supporter, a slide rail, a rack and a driving gear,the supporter is formed through being extended from the screen member,the slide rail and the rack are respectively formed on the moving plate,the supporter is able to slide on the slide rail, and the driving gearis engaged with the rack for the purpose of transmission.
 7. Thethree-dimensional printer according to claim 2, wherein the adjustingstructure includes a mobile member and a moving plate, the moving plateis arranged corresponding to the screen hole and formed with a trapezoidelongated hole, the mobile member is connected between the moving plateand the screen member, the mobile member is able to drive the movingplate to slide relative to the screen hole, so that the trapezoidelongated hole is able to be driven to slide relative to the screenhole.
 8. The three-dimensional printer according to claim 7, wherein themobile member includes a supporter, a slide rail, a rack and a drivinggear, the supporter is formed through being extended from the screenmember, the slide rail and the rack are respectively formed on themoving plate, the supporter is able to slide on the slide rail, and thedriving gear is engaged with the rack for the purpose of transmission.9. The three-dimensional printer according to claim 2, wherein theadjusting structure is a hole shielding member arranged corresponding tothe screen hole, and the hole shielding member is able to partiallyshield, fully shield or fully exposed the screen hole.
 10. Thethree-dimensional printer according to claim 9, wherein the holeshielding member includes a rotary shutter, a rack and a driving gear,the rotary shutter is arranged corresponding to the screen hole, therack is formed on the rotary shutter, the driving gear is engaged withthe rack for the purpose of transmission, so that the rotary shutter isable to be driven to be opened or closed.
 11. The three-dimensionalprinter according to claim 1, further including a cover structure, thereare a plurality of the nozzle holes formed on the same color sprayingnozzle, there are a plurality of the screen holes, each of the screenholes is arranged corresponding to each of the nozzle holes, the coverstructure is arranged corresponding to the plural screen holes, and thecover structure is able to partially cover, fully cover or fully exposethe plural screen holes.
 12. The three-dimensional printer according toclaim 11, wherein the cover structure includes at least one mobile covergate and at least one driving gear, the screen member includes asupporter, the mobile cover gate includes a slide rail and a rack, thesupporter is able to slide on the slide rail, the driving gear isengaged with the rack for the purpose of transmission, so that themobile cover gate is able to be driven to slide relative to the pluralscreen holes.
 13. The three-dimensional printer according to claim 1,wherein the length of the screen hole is smaller than that of the nozzlehole, and the width of the screen hole is smaller than that of thenozzle hole.
 14. The three-dimensional printer according to claim 1,wherein the three-dimensional printing module includes a moving unit anda three-dimensional printing nozzle, the moving unit is installed on themachine mainframe, and the three-dimensional printing nozzle is fastenedon the moving unit and moved with the moving unit.
 15. Thethree-dimensional printer according to claim 14, wherein the colorspraying nozzle is fastened on the moving unit and moved with the movingunit.
 16. The three-dimensional printer according to claim 14, whereinthe moving unit includes a first rod member, a second rod member and anozzle carrier, the nozzle carrier is formed with a first hole and asecond hole perpendicular to each other, the first rod member is sleevedin the first hole and capable of sliding therein, the second rod memberis sleeved in the second hole and capable of sliding therein, and thethree-dimensional printing nozzle is fastened on the nozzle carrier andmoved with the nozzle carrier.
 17. The three-dimensional printeraccording to claim 16, wherein the color spraying nozzle is fastened onthe nozzle carrier and moved with the nozzle carrier.
 18. Thethree-dimensional printer according to claim 1, wherein the colorspraying nozzle module further includes an actuation mechanism installedon the machine mainframe, and the color spraying nozzle is fastened onthe actuation mechanism and moved with the actuation mechanism.
 19. Thethree-dimensional printer according to claim 1, wherein the screenmember is fastened on the color spraying nozzle and served to cover thecolor spraying nozzle.
 20. The three-dimensional printer according toclaim 1, further including a processor respectively and electricallyconnected to the three-dimensional printing module and the colorspraying nozzle module, and the processor is used for receiving thethree-dimensional model data for calculating a color printing route ofthe color spraying nozzle.